The workers ______ a new hospital since the end of last year.A、have builtB、have

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问题 The workers ______ a new hospital since the end of last year.

选项 A、have built
B、have been building
C、had built
D、were building

答案 B

解析根据题意，该句用现在完成进行时(have been doing)，表示从去年年底，工人们一直在建造一所医院。

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